Selling your bike stuff on Urban Bikeways is easy. First, if you have not already registered, you can do so
here.
Once registered,
login and
create a new topic describing/showing the item you're selling, its location and final price.
If you don't wish to register and list the item yourself, you can email the item details to
mightybike@gmail.com to have it listed for you.
Please be sure to specify how potential buyers should contact you (e.g. email/phone).